AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

SkShaper: Fix a couple of crashes when fonts aren't found

Browse Source 
Change-Id: Id62bb0e0edde25fe90f63547d4dbedada2c09909
Reviewed-on: https://skia-review.googlesource.com/c/166803
Auto-Submit: Hal Canary <halcanary@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
This commit is contained in:
Hal Canary 2018-10-31 13:02:49 -04:00 committed by Skia Commit-Bot
parent dd79121e8f
commit 0dfa208450
2 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
modules/skshaper/src/SkShaper_harfbuzz.cpp
View File

@ -71,6 +71,9 @@ HBBlob stream_to_blob(std::unique_ptr<SkStreamAsset> asset) {
}
HBFont create_hb_font(SkTypeface* tf) {
if (!tf) {
return nullptr;
}
int index;
HBBlob blob(stream_to_blob(std::unique_ptr<SkStreamAsset>(tf->openStream(&index))));
HBFace face(hb_face_create(blob.get(), (unsigned)index));
@ -601,6 +604,9 @@ SkPoint SkShaper::shape(SkTextBlobBuilder* builder,
// TODO: language
hb_buffer_guess_segment_properties(buffer);
// TODO: features
if (!font->currentHBFont()) {
continue;
}
hb_shape(font->currentHBFont(), buffer, nullptr, 0);
unsigned len = hb_buffer_get_length(buffer);
if (len == 0) {

7
site/user/tips.md
View File

@ -110,8 +110,11 @@ engines can easily be supported in a like manner.
<span id="kerning">Does Skia shape text (kerning)?</span>
---------------------------------------------------------
No. Skia provides interfaces to draw glyphs, but does not implement a
text shaper. Skia's client's often use
Shaping is the process that translates a span of Unicode text into a span of
positioned glyphs with the apropriate typefaces.
Skia does not shape text. Skia provides interfaces to draw glyphs, but does
not implement a text shaper. Skia's client's often use
[HarfBuzz](http://www.freedesktop.org/wiki/Software/HarfBuzz/) to
generate the glyphs and their positions, including kerning.